[Matrixbeast]

Geki 9 and 10.
Braco reveals he had the Madoku all along! Shocking! He tries to convince Mele to join his side, but she turns him down and kills him. Using the Madoku, he revives himself before he explodes then tries to kill Mele.
Mele trains with the Gekiranger's Geki Bazooka, specifically to deflect the shot, and Jan notices she doesn't have the same evil aura as the other Rin Ju Den.

In the meantime, Braco uses 2 of the 6 total Madoku fangs to revive Kademu (Centipede) and Moriya (Gecko). No reason for why Maga and Sorisa weren't brought back, but whatever. They all attempt to kill Rio, but Mele returns and saves him last minute, awakening him from his meditation and kills Kademu. Moriya runs off and gets killed by the Gekirangers, while Braco tries to woo Mele over to his side once more by pointing out that, with only 3 Madoku left, she can't be revived since Rio would use them on the 3 Kenma. Mele don't care, takes the Madoku, and kills Braco.

Episode 10 has the rangers on an errand up a mountain, only to run into a pervy elephant man to train them in a special weapon style. Meanwhile, Rio is on the search for the first Kenma.

Edit!
Geki 11+12

So, I do just like to point out that most shows would give Red the first power up.
Gekiranger decides it's better than that. The first character to get a new power is Ran, who learns how to use the Geki Hammer and with it, gains the ability to call down the Geki Elephant for Geki Elephant Touja. Love it~
I also like that Ran quickly deciphered the "Lesson" Elehang was trying to teach her, but missed the point of it. Was nice.

In episode 12, Jan gains a new skill!
Using a towel.

God, I love this show.

In the meantime, Rio is off to find the first Kenma, awakening Sky Master Kata in 11, and then fighting him in 12.
In deadly battles there is training.
That's...One way to go about it.
Kata tries to turn on Rio, using Rio's past to eat his despair and kill him. Rio decides to eat his own despair and try to kill Kata, but decides that, since he managed to push him so far, that he's worth becoming his new teacher.
G'Job, guy.

This is why Gekiranger works so well. I hesitate to call them A and B plots since both of them can be equally important, while on other occasions one can be irrelevant. So I just go with Hero and Villain plots.
Here, the Hero plot is just filler. Eel monster who fights using slime, so find an alternate method to overcome him.
But the Villain plot is a major advancement. We gain a new villain and see his strength, we see Rio achieve a new level of power, and Rio accepts him as his new master.
This balance makes sure every episode is worth watching~